Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752523AbdGLNkd (ORCPT ); Wed, 12 Jul 2017 09:40:33 -0400 Received: from metis.ext.4.pengutronix.de ([92.198.50.35]:56799 "EHLO metis.ext.4.pengutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752446AbdGLNkb (ORCPT ); Wed, 12 Jul 2017 09:40:31 -0400 From: Oleksij Rempel To: kernel@pengutronix.de, Mark Brown , linux-spi@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Oleksij Rempel Subject: [PATCH v1] spi: loopback-test: provide loop request option. Date: Wed, 12 Jul 2017 15:40:20 +0200 Message-Id: <20170712134020.17927-1-o.rempel@pengutronix.de> X-Mailer: git-send-email 2.11.0 X-SA-Exim-Connect-IP: 2001:67c:670:100:1d::7 X-SA-Exim-Mail-From: ore@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-kernel@vger.kernel.org Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1538 Lines: 49 From: Oleksij Rempel Provide a module parameter to request internal loop by the SPI master controller. This should make loop testing easier without extra HW modification. Signed-off-by: Oleksij Rempel --- drivers/spi/spi-loopback-test.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) diff --git a/drivers/spi/spi-loopback-test.c b/drivers/spi/spi-loopback-test.c index f4875f177df0..34e1544d7d0e 100644 --- a/drivers/spi/spi-loopback-test.c +++ b/drivers/spi/spi-loopback-test.c @@ -51,6 +51,14 @@ MODULE_PARM_DESC(loopback, "is checked to match tx_buf after the spi_message " \ "is executed"); +/* the device is jumpered for loopback - enabling some rx_buf tests */ +int loop_req; +module_param(loop_req, int, 0); +MODULE_PARM_DESC(loop_req, + "if set enable controller will be asked to enable " \ + "test loop mode. If supported, MISO and MOSI will be " \ + "jumpered by SPI controller"); + /* run only a specific test */ int run_only_test = -1; module_param(run_only_test, int, 0); @@ -313,6 +321,16 @@ static int spi_loopback_test_probe(struct spi_device *spi) { int ret; + if (loop_req) { + spi->mode = SPI_LOOP | spi->mode; + ret = spi_setup(spi); + if (ret) { + dev_err(&spi->dev, "SPI setup wasn't successful %d\n", ret); + dev_err(&spi->dev, "SPI_LOOP is not supported by SPI master."); + return -ENODEV; + } + } + dev_info(&spi->dev, "Executing spi-loopback-tests\n"); ret = spi_test_run_tests(spi, spi_tests); -- 2.11.0